Some places are not meant to be lingering places. They are designed to be passed through quickly, to disappear from memory as soon as you have gone from point A to point B. When it happens for some reason that you linger in one, it takes on a completely different character. For instance, near Gate A2 in Chicago’s Midway airport, a placid-sounding valium-soothed woman repeats her warning every six seconds to prevent daydreaming people in the long white echoing high-ceilinged corridor from falling like felled trees when they run into the stationary ground at the end of the horizontal escalator. “Caution: The moving walkway is ending.” The people waiting at Gate A2 for their flight, which has been delayed for an hour and a half due to a thunderstorm in Denver, must nonetheless listen to this warning every six seconds until its interminably slow repetitive rhythm supplants their thoughts one by one. “Caution: The moving walkway is ending.”